Joseph Tainter wrote on 4/5/2005, 3:22 PM:
> "I have the Vivitar AF set which supports ALL functions necessary for > automatic aperture control and autofocus just like the "A" lenses." > > Christian, could you clarify which Vivitar set you have, and how one > finds them? The only Pentax AF extension tubes I am aware of are the > Kenko Teleplus extenders in 12 and 25 mm. lengths. I have to apologize for my treatment of photographic gear. I have no idea what model the vivitar tubes are... :-( All I know is that they have all the little contact thingies to support AF and metering. And, judging by the way these things are, I wouldn't be surprised if they were just re-branded Kenko tubes pr vice-versa... and looking at some eekbay stuff... the Kenko tubes do look just like my Vivitars. > Oh...weren't there some Vivitar tubes that also contained glass? Do you > have these? No. By definition, extension tubes should have no glass. There is a vivitar 2x Macro converter that is basically a helicoid extension tube grafted to a 2x TC. -- Christian [EMAIL PROTECTED]
